[Bytes #2-5] DIY Bluetooth MIDI Accordion

[@lidiatoma8959]

@Elecronic Bytes, Nice video man but I got a small question: how do you connect the hall sensors to the esp or better asked how do you power them because the work just with a minimum of 4.5v and the esp32 can deliver just 3.3v... I am a bit confused but hope that you can clarify that to me!

[@danielbob7769]

different power supplies or step-up esp32 output voltage to 4.5v

[@jakubek_24]

Congratulations! Thank you!

[@rajakaz4075]

I got plan to bulid same kind russian button accordeon (garmoshka) but i got no experience so far, i mean with electronics and stuff.. :( Awesome and inspiring video!

[@НаБаяне-п5п]

Great project!

[@53081church]

Bravo. Love your videos

[@MrMelzk]

Do you have midi on the bas register to? Can you make a step by step tutorial, i have i farfisa accordion That i want to rebuild to midi 😁 Greate video

[@phabyam]

wich resistor do you use for the hall sensor, why they need to be used?

[@MrMelzk]

Do you have any Schematic on the project, and it would be Nice to a walkthrue of the code there you explain the code 😊 please please please 😊

[@kentaccordionist]

Great video, but dude why not just but a secondhand Roland.

[@ADENMAN15]

Cool.

[@bhiwaniwala]

Is this velocity sensitive?

[@danielrichardson1210]

Do you have delay between the pressing of the key and the note when playing? Do midi over bluetooth increases delay?

[@electronicbytes5428]

There really isn't a delay that I can feel when pressing keys to audio from the speaker. It does feels real-time despite any Bluetooth latency that may exist. However, it is easy to induce delays - the largest component in delay is how fast the code captures the key states from the sensors and processes that into midi messages. With the ESP, as long as I don't print anything to serial and run only the code necessary for generating and sending the midi messages, the delay is barely perceptible. Also, if I move the accordion into a different room (maybe past some walls with wiring and plumbing), I do get a bit of delay.

[@danielrichardson1210]

@@electronicbytes5428 great! I have to give it a try... the silent instrument is very useful

[@danielrichardson1210]

@@electronicbytes5428 and would it work same way (parallel capture, polyphonic) with an multiplexer as Cd74hc4067?

[@electronicbytes5428]

@@danielrichardson1210 ​ You've picked out a mux/demux chip, there are some fine details but they probably won't make a difference. I think it would be "good enough" if you switch things fast enough. It's not "true" parallel capture, but if you grab the data from the chip fast enough, there should be no difference to human ears. You've also picked out an analog mux, which means that if you capture the state of a key while it's transitioning from 0->1 or 1->0, the ESP will have to decide which one it is, rather than the chip deciding. The 4067's package size is also slightly larger than the shift register I used, so check if you've got place to put it inside the case before starting assembly. The 60 ohms "on" resistance might give you trouble if you're switching things too fast, but I don't think you'll get to those speeds where you worry about it. So overall, yes, you can make it work.

[@danielrichardson1210]

@@electronicbytes5428 The Hall effect sensor is working: kzbin.info/www/bejne/enXQaoacq9-bpc0 Now, could I just make a matrix with diodes using GPIOs to scan the 44 keys? That's all I need for notes

[@cannonosentowski9313]

I will pay you to fix my midi accordion or at least tell me what system I need to buy for it…